GB1431481A - Circuit arrangement having an amplitude and frequency dependent transfer function - Google Patents

Circuit arrangement having an amplitude and frequency dependent transfer function

Info

Publication number
GB1431481A
GB1431481A GB1458973A GB1458973A GB1431481A GB 1431481 A GB1431481 A GB 1431481A GB 1458973 A GB1458973 A GB 1458973A GB 1458973 A GB1458973 A GB 1458973A GB 1431481 A GB1431481 A GB 1431481A
Authority
GB
United Kingdom
Prior art keywords
amplitude
impedance
transistor
circuit
input
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB1458973A
Other languages
English (en)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Philips Electronics UK Ltd
Original Assignee
Philips Electronic and Associated Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from NL7204290A external-priority patent/NL7204290A/xx
Priority claimed from NL7301752A external-priority patent/NL7301752A/xx
Application filed by Philips Electronic and Associated Industries Ltd filed Critical Philips Electronic and Associated Industries Ltd
Publication of GB1431481A publication Critical patent/GB1431481A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/24—Signal processing not specific to the method of recording or reproducing; Circuits therefor for reducing noise
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
    • G11B23/0007—Circuits or methods for reducing noise, for correction of distortion, or for changing density of recorded information
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G9/00—Combinations of two or more types of control, e.g. gain control and tone control
    • H03G9/02—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers
    • H03G9/12—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers having semiconductor devices
    • H03G9/18—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers having semiconductor devices for tone control and volume expansion or compression
GB1458973A 1972-03-30 1973-03-27 Circuit arrangement having an amplitude and frequency dependent transfer function Expired GB1431481A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL7204290A NL7204290A (sv) 1972-03-30 1972-03-30
NL7301752A NL7301752A (sv) 1973-02-08 1973-02-08

Publications (1)

Publication Number Publication Date
GB1431481A true GB1431481A (en) 1976-04-07

Family

ID=26644756

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1458973A Expired GB1431481A (en) 1972-03-30 1973-03-27 Circuit arrangement having an amplitude and frequency dependent transfer function

Country Status (12)

Country Link
JP (1) JPS5649008B2 (sv)
AR (1) AR195708A1 (sv)
AT (1) AT346906B (sv)
BE (1) BE797480A (sv)
CA (1) CA975439A (sv)
CH (1) CH561488A5 (sv)
DE (1) DE2312086C3 (sv)
ES (1) ES413099A1 (sv)
FR (1) FR2178108B1 (sv)
GB (1) GB1431481A (sv)
IT (1) IT980703B (sv)
SE (1) SE388988B (sv)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4445054A (en) * 1980-09-29 1984-04-24 Tokyo Shibaura Denki Kabushiki Kaisha Full-wave rectifying circuit
EP0330583A2 (fr) * 1988-02-26 1989-08-30 L'oreal Méthode pour améliorer l'aspect esthétique de la peau à l'aide de mélanges polyvitaminiques et compositions cosmétiques pour sa mise en oeuvre

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3909733A (en) * 1973-05-17 1975-09-30 Dolby Laboratories Inc Dynamic range modifying circuits utilizing variable negative resistance
NL7413514A (nl) * 1974-10-15 1976-04-21 Philips Nv Inrichting voor het naar keuze realiseren van twee onderling komplementaire funkties.
JPS55156431A (en) * 1979-05-24 1980-12-05 Sony Corp Noise reduction system
JPH0483548A (ja) * 1990-07-24 1992-03-17 Masaya Koyama 泡立機及び泡立容器

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2730576A (en) * 1951-09-17 1956-01-10 Bell Telephone Labor Inc Miniaturized transistor amplifier circuit
GB920723A (en) * 1960-07-07 1963-03-13 Ass Elect Ind Amplifier circuit
US3368158A (en) * 1965-05-14 1968-02-06 Bell Telephone Labor Inc Low-level automatic gain control circuitry
US3444474A (en) * 1965-12-10 1969-05-13 Bell Telephone Labor Inc Active equalizer circuit
JPS576341B2 (sv) * 1972-08-23 1982-02-04

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4445054A (en) * 1980-09-29 1984-04-24 Tokyo Shibaura Denki Kabushiki Kaisha Full-wave rectifying circuit
EP0330583A2 (fr) * 1988-02-26 1989-08-30 L'oreal Méthode pour améliorer l'aspect esthétique de la peau à l'aide de mélanges polyvitaminiques et compositions cosmétiques pour sa mise en oeuvre
EP0330583A3 (fr) * 1988-02-26 1991-03-13 L'oreal Méthode pour améliorer l'aspect esthétique de la peau à l'aide de mélanges polyvitaminiques et compositions cosmétiques pour sa mise en oeuvre

Also Published As

Publication number Publication date
DE2312086C3 (de) 1979-10-31
ATA270873A (de) 1978-04-15
AT346906B (de) 1978-12-11
CA975439A (en) 1975-09-30
FR2178108B1 (sv) 1976-05-21
JPS4910010A (sv) 1974-01-29
DE2312086A1 (de) 1973-10-31
ES413099A1 (es) 1976-01-16
CH561488A5 (sv) 1975-04-30
FR2178108A1 (sv) 1973-11-09
IT980703B (it) 1974-10-10
SE388988B (sv) 1976-10-18
JPS5649008B2 (sv) 1981-11-19
DE2312086B2 (de) 1979-03-22
AR195708A1 (es) 1973-10-31
BE797480A (fr) 1973-09-28

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee